According to Ahmed Best, who played the most universally despised figure ever to appear on film (and, yes, that's including Triumph Of The Will), his part in Star Wars nearly went to Michael Jackson:
"Me, Natalie Portman, and George's kids - we were at Wembley Arena at Michael Jackson's concert. We were taken backstage and we met Michael.Best's theory is that Lucas didn't want to have Jacko in the film because his presence would have overwhelmed the movie. Which is a bit like someone taking a poo in the kitchen sink but moving the dishcloths first so it doesn't get too unhygienic.
"There was Michael and Lisa Marie [Presley]. George introduced me as 'Jar Jar' and I was like, 'That's kind of weird.' Michael was like, 'Oh. OK.' I thought, 'What is going on?'
"After Michael had driven off, we all go back up to a big afterparty. I'm having a drink with George and I said, 'Why did you introduce me as Jar Jar?"
"He said, 'Well, Michael wanted to do the part but he wanted to do it in prosthetics and make-up like Thriller.' George wanted to do it in CGI."